PR1860 - We can't save a list of ExtractElement instructions to CSE because some of these instructions
may be removed and optimized in future iterations. Instead we save a list of basic blocks that we need to CSE.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195791 91177308-0d34-0410-b5e6-96231b3b80d8